Datalist inside update panel linkbutton is not downloading f

Hi,

DataList Inside update panel linkbutton is not downloading file.

Below is my code

"UpdatePanel1" runat="server">
"server" ID="UpdatePanel1" ChildrenAsTriggers="false">
"vertical-align: middle; min-height: 480px;" class="pre-scrollable">
"DataList2" runat="server" p Font-Bold="False" Font-Italic="False" Font-Overline="False" Font-Strikeout="False" Font-Underline="False" HorizontalAlign="Center" RepeatLayout="Table">
"Label2" runat="server" Text='<%# Eval("FileName") %>'>
"LinkButton1" runat="server" Text='<%# Eval("ImagePath") %>' OnClick="DownloadFile" CommandArgument='<%# Eval("Id")%>'>